Do a search for D400. There are over 2,000 messages on this topic. Then do a search for the D9300 forms. Several months ago they said the D9300 was the replacement for the D300/D300s Unfortunately that September announcement doesn't look like it's going to happen.
I sold my D300 and moved on 12 months ago to a D7100. It took a while to adjust to the smaller size and the new AF system but my image quality is excellent and better than the D300. Although the buffer is smaller, I have yet to fill it and the FPS is less than the D300s but I am managing.
D750 & D7100 | 24-70 F2.8 G AF-S ED, 70-200 F2.8 AF VR, TC-14E III, TC-1.7EII, 35 F2 AF D, 50mm F1.8G, 105mm G AF-S VR | Backup & Wife's Gear: D5500 & Sony HX50V | 18-140 AF-S ED VR DX, 55-300 AF-S G VR DX | |SB-800, Amaran Halo LED Ring light | MB-D16 grip| Gitzo GT3541 + RRS BH-55LR, Gitzo GM2942 + Sirui L-10 | RRS gear | Lowepro, ThinkTank, & Hoodman gear | BosStrap | Vello Freewave Plus wireless Remote, Leica Lens Cleaning Cloth |
Comments
I sold my D300 and moved on 12 months ago to a D7100. It took a while to adjust to the smaller size and the new AF system but my image quality is excellent and better than the D300. Although the buffer is smaller, I have yet to fill it and the FPS is less than the D300s but I am managing.
|SB-800, Amaran Halo LED Ring light | MB-D16 grip| Gitzo GT3541 + RRS BH-55LR, Gitzo GM2942 + Sirui L-10 | RRS gear | Lowepro, ThinkTank, & Hoodman gear | BosStrap | Vello Freewave Plus wireless Remote, Leica Lens Cleaning Cloth |
http://forum.nikonrumors.com/discussion/34/d300s-successor-d400-what-and-when/p1